bash - 在不指定 Bash 中的索引的情况下向数组添加新元素

Question

有没有办法在 bash 中做类似 PHPs $array[] = 'foo'; 的事情:

array[0]='foo'
array[1]='bar'

Answer 1

是的，有:

ARRAY=()
ARRAY+=('foo')
ARRAY+=('bar')

Bash Reference Manual :

In the context where an assignment statement is assigning a value to a shell variable or array index (see Arrays), the ‘+=’ operator can be used to append to or add to the variable's previous value.

还有:

When += is applied to an array variable using compound assignment (see Arrays below), the variable's value is not unset (as it is when using =), and new values are appended to the array beginning at one greater than the array's maximum index (for indexed arrays)